Autism / Autism Spectrum Support Group
Autism is classified as a neurodevelopmental disorder which manifests itself in markedly abnormal social interaction, communication ability, patterns of interests, and patterns of behavior. Although the specific etiology of autism is unknown, many researchers suspect that autism results from genetically mediated vulnerabilities to environmental triggers.
You don't say how old your gs is, potty training starts later for many on the spectrum. They maybe waiting for him to show interest and he isn't.
I'm glad your gs has you to fight for what he needs:)
how old is your grandson?